cover Fort Delaware, Del., prisoner's letter oval h.s. type I on 3c red on white star die entire (U26) to Edinburg, Shenandoah County, Virginia, used with C.S.A. 10c Blue (11) (trimmed corners) which is tied by Richmond c.d.s., JUN 22 Delaware City/Del. c.d.s. and oval 'Due 6' h.s., ms. 'Via Flag of Truce by Fortress Monroe', some foxing, still fine and scarce, the 3c U.S. was demonetised and not recognized as valid postage, illustrated on pg. 91 of Civil War Prisons and Their Covers by Earl Antrimphoto est.